Ultrasound (Edexcel GCSE Physics): Flashcards
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Ultrasound frequency threshold
Ultrasound frequency threshold
Above 20,000 Hz
Definition of ultrasound
Definition of ultrasound
Sound waves with frequency above 20,000 Hz
How ultrasound waves are produced
How ultrasound waves are produced
Electrical oscillations converted to mechanical vibrations
Partial reflection in ultrasound
Partial reflection in ultrasound
Part reflected at boundary, rest transmitted
Ultrasound boundary detection principle
Ultrasound boundary detection principle
Reflected waves from boundaries show location
Distance calculation using ultrasound
Distance calculation using ultrasound
Time for echoes to return to detector
Medical use of ultrasound
Medical use of ultrasound
Prenatal scanning of foetus
How ultrasound creates foetal images
How ultrasound creates foetal images
Computer processes timing & distribution of echoes
Industrial use of ultrasound
Industrial use of ultrasound
Finding flaws in materials like metal or wood
How ultrasound detects material flaws
How ultrasound detects material flaws
Flaws cause earlier reflection than far side